Nut-lock.



B. W. HENNINGS.

NUT LOCK.

APPLICATION FILED MAY \9. 1910. RENEWE D DEC- 3.1917.

Patented J une 25, 19 18.

I UNITED STATES PATENT OFFICE,

BRUNO ,W. or FRESNO, oenrronma, AssiGNon or oltnroiinfrri T0 DONALDnonnnrson, or SAN rnenorsco, CALIFORNIA, .AND ONE-FOURTH T0 enoncn r.

BEVERIDGE, or rnnsno, QALIFORNIA.

NUT-LOCK.

Patented J1me25, 1918 Application filed May 19, 1910, Serial No.562,279. Renewed December3, 1917." Serial No. 205,235.

To all whom it may concern:

Be it known that I, BRUNO WV. .I'IENNING, of Fresno, California, haveinvented certain new and useful Improvements in Nut-Locks, whereof thefollowing is a specification.

This invention relates to nut locking devices, and is designed to permitthe locked nut to be released and removed without mutilating the nut,the bolt or the locking device. In carrying out the invention I form ahousing of a band of resilient metal, which housing extends across underthe nut with a hole for the passage of the bolt, up at the sides of thenut, and over the top thereof with holes for the passage of the bolt.The top portions, or ends of the band, overlap on the top of the nut.'The housing is so proportioned that, when free to do so, theoverlapping ends will tend to draw apart, and the sides of the holesthrough them will engage or clamp against the bolt and jam and preventany rotation thereof. The details of formation will appear hereinafterin connection with the description of the accompanying drawing, in whichI have illustrated the device in the form which I have found, inpractice, to be most effective.

In the drawing Figure 1 is a perspective view of the metal housing byitself, ready for use.

Fig. 2 is a sectional elevation showing two plates to be fastenedtogether, with a bolt and nut, and the locking housin applied thereto,before the nut is screwed ome.

Fig. 3 is a similar view to Fig. 2, but after the nut is screwed home.

Fig. 4 is a top view of the housing by I itself, as it appears in Fig.3.

, forming this office.

In the figures 1 and 2 are two pieces of material to be bolted together,and 3 is the bolt for per- 4 is the nut on the bolt. A represents thehousing comprising the bottom plate 5, the side plates 6 and theoverlapping top plates 7. The top and bottom plates, 7 and 5, areperforated with holes of a size to easily pass the bolt 3. The parts areso proportioned that normally the bolt passes. freely through them,without binding, and the bottom plate 5, is curved downwardly, as seenin Fig. 2. When now, the nut is screwed home, the bottom plate isflattened out, as seen in Fig. 3; this throws the side plates outward,as also seen in that figure, and thereby draws the top plates outward,causing the edges of the. holes therethrough to engage the bolt, and actas a clamp or jam for the nut. The outer edges of the holes through thetop plates may be chamfered, as shown at 8, whereby they bind even moreeffectively against the threads of the bolt. The housing A may be madeof resilient material, and may be used many times. I11 use, the wrenchapplied to the nut to turn it, will hold the sides of the housingagainst the sides of the nut, and thus maintain the bolt free from theedges of the holes, but when the nut is screwed home, and the wrenchremoved, the side plates spring outward and cause the edges of the holesto engage the bolt. Upon reapplying the wrench that engagement is brokenand the nut may be removed.

I claim 1. In a nut lock, a housing comprising bottom, side and topplates, the bottom plate having its outer wall convexed and the saidbottom and top plates having apertures for the bolt.

2. In a nut locking device, a housing comprising a bottom, side and topplates, the said bottom and top plates being perforated for the passageof a bolt, and means for forcing the top plates outwardly into clampedengagement with the bolt.

3. In combination with a bolt and nut, a nut-lock comprising a bottomplate and in tegral side and top plates, the said bottom and top platesbeing apertured for the passage of a bolt, the said top plates having bot engaging edges, and said bottom plates being convex to form a leverfor bringing said bolt engaging edges of the top plates into engagementwith said bolt.

4. In combination with a bolt, a nut-lock comprising a bottom plate andintegral side and top plates, said top and bottom plates being aperturedfor the passage of a bolt, the top plates having knife-like boltengaging edges, and the bottom plate being convex, a. nut forcing saidbottom plate on the member to which said nut-lock is to be applied, andthe said top plates being moved outwardly and radially through themovement of the bottom plate.

5. In a nut look, a housing comprising bottom, side and overlapping topplates, the top and bottom plates having circular openings to receive abolt, the Walls of the QPGIP.

ings in the overlapping portions. comprising knife like edges saidbottom plate being rectiohsj of'the top plates.

curved downwardly whereby the knifelike edges are brought intoengagement with the opposite sides of the bolt when pressure brought tobear onthe bottom plate.

6. In anut look, a housing comp-rising bottom, side and overlapping topplates, the

bottom and-top plates having circular openings to receive a bolt,'thelower plate being Copies of this patent may be obtained for curveddownwardly, and said plates being arranged whereby flattening of thebottom plate will cause a movementin opposite di- Intestir'nony that Iclaim the foregoihg I have hereto set my hand in the presence ofWitnesses this 29thof April, 1910.

BRUNO W. HENNING. Witnesses:

W. S. BATEs,1

D. B. RICHARDS.-

five cents each, byjaddressing the Gommissioneraof Patents.Washlngtomhfi)? I a

